1893.] 



PUBLIC DOCUMENT — No. 33. 



173 



shaded the ground sufficiently to prevent any serious ap- 

 pearance of weeds. The variation in the cok>r of the crop 

 was quite marked in different plats during the earlier stages 

 of its growth. Those plats which received an addition of 

 nitrogen in form of nitrate of soda showed a deeper green 

 color than those which received other forms of nitrogen, 

 in particular, sulphate of ammonia ; while those that received 

 no addition of nitrogen maintained a light green color until 

 the close of the season. 



Height of the Plants upon Different Plats during the Season. 



Yield of Crop on Different Plats. 



